urn:lsid:ibm.com:blogs:entries-84a1e68f-fa2b-4d83-a240-5f565e7d6248Mainframe Performance Topics with Martin Packer - Tags - expanded I'm a well-known mainframe performance guy, with almost 30 years of experience helping customers manage systems. I also dabble in lots of other technology. I've sought to widen the Performance role, incorporating aspects of infrastructural architecture.
I'm a world-famous podcaster and screencaster (albeit VERY thinly spread). :-)03012018-03-05T10:04:30-05:00IBM Connections - Blogsurn:lsid:ibm.com:blogs:entry-89e83651-3907-405c-8809-0cf58a2a5ac4New Blog Banner - In Honour Of The New zEnterprise EC12 (zEC12)MartinPacker11000094DHactivefalseComment Entriesapplication/atom+xml;type=entryLikestrue2012-09-06T06:24:31-04:002012-09-06T06:24:31-04:00<p>I hope you like my new blog banner - in honour of the new zEnterprise EC12.</p>
<p>We actually announced the zEC12 (for short) the day I returned from vacation. Great planning, IBM! <img src="https://www.ibm.com/developerworks/community/blogs/images/smileys/smile.gif" class="smiley" alt=":-)" title=":-)" /> It's taken me a while to catch up - and changing the banner was an important step. <img src="https://www.ibm.com/developerworks/community/blogs/images/smileys/smile.gif" class="smiley" alt=":-)" title=":-)" /></p>
<p>I've known about the soon-to-be-announced processor range for quite some time, as I think you'd expect. And tracked what was going to be announced quite carefully. The trouble with tracking something to announcement is you lose some of the "surprise!" factor - which I used to quite like back in my younger days.</p>
<p>I won't precis the announcement details here. But suffice it to say the zEC12 is improved compared to the z196 in almost every area.<sup>1</sup>.</p>
<p>You could call it "evolution" rather than "revolution" but there have been a multitude of changes in places that matter. I'd like to highlight, though, a few <b>qualitatively new</b> features:</p>
<ul>
<li><b>zAware</b> - which runs in a special LPAR and uses analytics capabilities to analyse system messages, providing an almost real time view of systems' health. It learns from the message traffic patterns, using the information to identify unusual system behaviour and minimise its impact. It's based on technology from IBM Research. </li>
<li><b>Flash Express</b> - which some people have commented looks like a rerun of Expanded Storage. Personally I've seen a number of nasty customer situations where this would've really helped out. I'm thinking of when systems have to capture a dump at just the wrong moment - or into already over-committed memory/paging subsystem configurations. I'd like to think it would be equally useful for the happier times, too - such as workload bursts and batch/online transitions.</li>
<li><b>CFLEVEL 18</b> - which has many enhancements. For me the one that caught my eye was the enhancements to path statistics, externalised through RMF. I'm going to write a post on this some time. (I believe this one, though part of the announcement, is retrofitted to z196. I hope so because I'd like to see customer data with these new fields in from older machines than the zEC12. </li>
<li><b>Transactional Memory</b> - which is aimed at increasing concurrency for applications that use a shared set of data. As we go to higher numbers of processors and degrees of concurrency this sort of thing becomes increasingly important.</li>
</ul>
<p>This obviously isn't an exhaustive list but it gives you a flavour: Each new processor range is more than just faster / higher capacity / better environmentals.</p>
<p>For much more detail read the two Redbooks:
<ul>
<li><a href='http://www.redbooks.ibm.com/redpieces/abstracts/sg248050.html'>IBM zEnterprise EC12 Technical Introduction</a></li>
<li><a href='http://www.redbooks.ibm.com/redpieces/abstracts/sg248049.html'>IBM zEnterprise EC12 Technical Guide</a></li>
</ul>
<p>The team that wrote these excellent Redbooks includes a number of friends of mine. I found the books a very enjoyable read. Note: They are still in draft.</p>
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<li> One exception - which I really don't think will affect many customers - is maximum memory: It stays at 3TB.</li>
</ol>I hope you like my new blog banner - in honour of the new zEnterprise EC12. We actually announced the zEC12 (for short) the day I returned from vacation. Great planning, IBM! It's taken me a while to catch up - and changing the banner was an important step....006653urn:lsid:ibm.com:blogs:entries-84a1e68f-fa2b-4d83-a240-5f565e7d6248Mainframe Performance Topics with Martin Packer2018-03-05T10:04:30-05:00